How Insurance Claims Work After an Accident in Illinois

Illinois uses an at-fault (tort) insurance system. The driver who caused the accident is financially responsible for the other party's damages — medical bills, lost wages, vehicle repair, and pain and suffering. Illinois is not a no-fault state, so there is no personal injury protection (PIP) requirement.

As the injured party in Illinois, you have three paths to compensation. You can file a third-party claim directly against the at-fault driver's liability insurance. You can file a first-party claim with your own insurer under your collision, medical payments, or uninsured motorist coverage. Or you can file a personal injury lawsuit in court. Most claims start with the insurance process and escalate to a lawsuit only if settlement negotiations fail.

Illinois's modified comparative negligence rule (735 ILCS 5/2-1116) applies to insurance claims. If you are partially at fault, your compensation is reduced by your fault percentage. If you are more than 50% at fault — meaning 51% or higher — you recover nothing. Insurance adjusters know this and will aggressively argue that you share blame to reduce what they pay.

Illinois law requires all drivers to carry minimum liability insurance under 625 ILCS 5/7-601. The minimums, defined in 625 ILCS 5/7-203, are 25/50/20: $25,000 bodily injury per person, $50,000 bodily injury per accident, and $20,000 property damage per accident. Driving without insurance is a Class A misdemeanor in Illinois, carrying fines up to $2,500 and potential license suspension.

These minimums are dangerously low. A serious car accident can produce medical bills exceeding $25,000 for a single person in the first week of treatment. If the at-fault driver carries only the minimum and your medical bills are $80,000, you face a $55,000 gap. This is where your own underinsured motorist coverage becomes critical — if you have it.

Illinois insurers are required to electronically report coverage information to the Illinois Secretary of State. Drivers must carry proof of insurance in the vehicle at all times. If you are stopped without proof of insurance, you face a fine and potential license plate suspension.

Uninsured motorist (UM) coverage is mandatory in Illinois under 215 ILCS 5/143a. Every auto policy must include UM coverage at minimum limits of $25,000 per person and $50,000 per accident for bodily injury. UM coverage protects you when you are hit by a driver who has no insurance, a hit-and-run driver, or a driver whose insurer has become insolvent. Illinois is one of only 22 states that mandate UM coverage.

UM coverage in Illinois applies broadly. It covers the named insured, family or household members, passengers in the insured vehicle, and pedestrians or bicyclists struck by an uninsured driver. Policyholders may reject UM coverage in writing, but if no written rejection is on file, UM limits must match the policy's bodily injury liability limits.

Underinsured motorist (UIM) coverage is not required in Illinois under 215 ILCS 5/143a-2, but it is available and strongly recommended. If you purchase UM limits above the minimum, UIM coverage is automatically included at the same limits. UIM protects you when the at-fault driver has insurance but their limits are too low to cover your damages — a common scenario in serious injury cases where minimums fall far short of actual medical costs.

Step 1: At the scene, call 911 if there are injuries. Exchange insurance and contact information with all drivers, photograph damage and the scene from multiple angles, and get contact information for witnesses. Do not admit fault or apologize. Step 2: Report the accident to police. Illinois law requires reporting any accident involving death, injury, or property damage over $1,500 to law enforcement. If no officer responds to the scene, file a crash report with the Illinois Department of Transportation (IDOT) within 10 days.

Step 3: Notify your own insurance company promptly. Most Illinois policies require notification within 24 to 72 hours of the accident, even if you were not at fault. Provide basic facts only — date, time, location, vehicles involved, and the police report number. Do not speculate about fault or the extent of your injuries. Step 4: Seek medical treatment immediately. Delayed treatment hurts both your health and your claim. Insurance adjusters will argue that gaps in treatment mean your injuries are not serious.

Step 5: File your claim — either a first-party claim with your own insurer or a third-party claim against the at-fault driver's insurer. You will need your insurance details, the other driver's information, the police report, and documentation of your damages. Step 6: The insurer must provide claim forms within 15 working days of your request and must communicate with you within 21 working days of being notified of the loss. Step 7: The adjuster investigates, calculates compensation, and makes a settlement offer. You can accept, negotiate, or reject the offer and file a lawsuit.

The insurance adjuster works for the insurance company, not for you. Their job is to minimize what the company pays. They are trained to get you to say things that reduce your compensation — and they handle hundreds of claims while this is likely your first.

Share: your name and contact information, the date and location of the accident, that you were involved in the accident, and that you are receiving medical treatment. Direct the adjuster to your attorney if you have one. Never say: 'I'm fine' or 'I feel okay' (soft tissue injuries, concussions, and disc herniations often worsen over days or weeks), 'I'm sorry' or anything that could be interpreted as admitting fault, speculation about what happened, or details about pre-existing conditions.

Do not give a recorded statement to the other driver's insurance company. You are under no legal obligation to do so in Illinois. A recorded statement gives the adjuster a permanent transcript they can comb through for inconsistencies and admissions. If the adjuster presses you, say: 'I decline to give a recorded statement at this time.' If you have already said something you regret, stop answering questions and consult an attorney before any further communication.

Reject a settlement offer if: you have not reached maximum medical improvement (MMI), the offer does not cover all medical expenses including anticipated future treatment, the offer ignores lost wages and reduced earning capacity, or the offer does not include fair compensation for pain and suffering. First offers from insurance companies are typically well below what the claim is actually worth.

An offer may be reasonable if: you have reached MMI and know your total medical costs, the offer covers all economic and non-economic damages, the at-fault driver's policy limits have been reached, or further litigation costs would exceed the likely additional recovery.

Once you accept a settlement and sign a release, the claim is permanently closed. You cannot go back for more money if your condition worsens or you need additional surgery. Settling before reaching MMI is risky. If the insurance company is pushing you to settle quickly, that urgency usually means the claim is worth more than they are offering.

If your accident involved an Illinois government entity — a city bus, county maintenance vehicle, or state highway department truck — you face shorter deadlines and additional requirements. Under 745 ILCS 10/8-101 (the Local Governmental and Governmental Employees Tort Immunity Act), you must file suit within 1 year of the date of injury — half the normal 2-year statute of limitations for personal injury claims.

Written notice may also be required under Section 8-102 of the Act. Failure to serve proper notice can result in dismissal and a permanent bar to your claim under Section 8-103. The notice must describe the circumstances of the injury and be served on the correct government body.

For claims against the State of Illinois itself, you must file notice with the Attorney General's office and the Clerk of the Court of Claims within 1 year of the injury under 705 ILCS 505. Missing these deadlines bars your claim entirely. If your accident involved any government entity, consult an attorney immediately — the compressed timeline leaves no room for delay.

Illinois's statute of limitations for personal injury claims is 2 years from the date of injury (735 ILCS 5/13-202). For property damage, the deadline is 5 years. Government tort claims must be filed within 1 year under 745 ILCS 10/8-101. For property damage claims against government entities that exceed 60 days unresolved, the insurer must provide a written explanation.

Insurance companies know these deadlines and may delay to weaken your position. As the statute of limitations approaches, the insurer knows your leverage decreases. Starting the claims process early and consulting an attorney well before any deadline preserves your negotiating position.

Insurance company pressuring you to settle? Not sure if the offer is fair? Get your free Injury Claim Check. You will answer a few questions about your accident and injuries, and we will provide a personalized report that includes what your Illinois insurance claim may actually be worth, how the at-fault system and comparative negligence rule affect your recovery, and whether connecting with an Illinois personal injury attorney makes sense for your situation.

The insurance company has a team of adjusters and attorneys working to minimize your payout. Understanding your rights and the value of your claim is the first step toward a fair outcome. Free, confidential, and takes less time than being on hold with an insurance company.